水平放置圆柱型铝硅合金储热体数值模拟  

NUMERICAL SIMULATION OF THERMAL STORAGE USING Al-Si ALLOY IN HORIZONTAL CYLINDRICAL

作　　者：陈观生[1] 张仁元[1] 李风[1] 张莉[1] 

机构地区：[1]广东工业大学材料与能源学院,广州510006

出　　处：《太阳能学报》2012年第12期2093-2097,共5页Acta Energiae Solaris Sinica

基　　金：国家高技术研究发展(863)计划(2007AA05Z460)

摘　　要：对以铝硅合金为相变储热材料的槽式抛物面聚光太阳能中高温热利用系统中具有吸热、储热及供热功能的储热体进行数值模拟。所模拟的储热体为长圆柱形,水平放置,其尺寸为φ410-1000-100mm,外圆周半边吸热,中心管供热。所模拟的过程包括储(吸)热过程及放(供)热过程。模拟结果表明,该型储热体在储热及放热过程中温度较稳定,铝硅合金的相变潜热可得到充分利用,适合在700～900K温度区间、20～50kW/m2加热及放热热流密度下工作。Solar thermal storage units were simulated using Al-Si alloy as phase change materials （PCMs） , which integrated the function of heat absorbing, charging and discharging in one device. The solar thermal storage cylindrier was in horizontal arrangement with the size of φ410 × 1000 × 100mm, and the simulated process includes heat charging （absorbing） and discharging （feeding） process. The simulation results show that the latent heat of Al-Si alloy can be fully used, and those units can run safety and steadily under the condition of temperature 700-900K with heat charging and discharging flux 20-50kW/m2. The results also provide the design basis of thermal storage body using Al-Si alloy as PCM in high and medium temperature solar thermal energy system with parabolic trough solar concentrators.

关 键 词：铝硅合金 太阳能 中高温 相变 储热 槽式聚光 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]